Explosive-engine primer.



J. B. W ETMORE.

EXMOSWE msm; mmm.

1,128,643. Patented Feb.16,1915.

UNITED STATES PATENT oEEioE. y

JAMES B. WETMORE, '0F CHICAGO, ILLINOIS, ASSIGNOR T0 WILLIAM'. A. PRESS, 0F

CHICAGO, ILLINOIS.

EXPLOSIVE-ENGINE PRIMER Specification of Letters Patent. `Pte11ted Feb. 16, 1915.

Application med March 2, 1914. Serial No. $1,965.

T0 all whom it may concern:

Be it known that I, JAMES B. WETMORE, a citizen of. the United States, residing at Chicago, Cook county, Illinois, have invented certain new and useful Improvements i in Explosive-Engine Primers, of which the following is al specification.

My invention relates to a primer for explosive engines and the object thereof is to provide a simple, leflicient and reliable primer for injecting the fuel directly into the cylinders of the engine for starting purn poses.

Various features of advantage and utility in my primer will be apparent from the description hereinafter given.

In the drawing,` Figure 1 is an elevation of the primer shown attached to the dash of an automobile; Fig. 2 a central longitudinal section thereof; and Fig. 3 a cross section on Y the line 3-3 of Fig. 2.

Referring to the particular embodiment of my invention as herein shown, the primer comprises a cylinder 1 containing a piston chamber 2 within-which reciprocates a piston or plunger 3. The cylinder is adapted to be supported in any desired position and in any desired manner adjacent the engine or upon the automobile body in case the engine is used for Aoperating an automobile. In the present instance I have shown this cylinder passing through the dash A of an automobile and secured thereto by means of a collar 4 which is fastened to the dash by means of the screws 5. The cylinder is prevented from turning in the collar in any suitable manner as by-means of the pin or projection 6 received within the longitudinal groove 1a of the cylinder. The rearward end of the cylinder is closed by means of an end cap 7 through which passes the stem 8 of the piston terminating in a handle 8a. The end cap screws upon the end ofthe cylinder and against the collar fi whereby the structure is held securely and firmly in place upon the dash. By preference a removable bushing 9 is inset in the rearward end of the piston chamber 2, such bushing being of considerable length and at its for ward end confining an annular packing 24 which is so arranged as to remain in contact with the cylindrical rear cndof the piston throughout its range of movement.,

vided with an inlet port 10 adapted to com- Inunicate with a source of fuel supply such as gasolene, and with the piston chamber 2.

This port is check-valved and according to the construction herein illustrated a nipple 11 is screw-threaded into the end of the cylinder to form a continuation or part of the inlet port 10 and to contain the check valve which is in the form of a ball. V12, spring-pressed by means of a light spring 13. The forward end ofl this nipple is also screw-threaded so that it may be readily connected to a pipe or the like communicating with the source of fuel.

The forward end of the piston is provided with a longitudinal passage 14 communicating with the forward end of the piston chamber 2 and at its rearward end turned at right angles to communicate with a circumferential groove 3a on the piston. This passage 14 is by preference check-valved, and according to thepresent construction, a bushing 15 is screwthreaded into the forward end of the piston and forms a continuation or part of the passage 14. This kbushing contains a check-valve which is in gine, it is obvious that the number of these' discharge ports will correspond with the number of cylinders of the engine. These discharge ports pass through the cylinder` and emerge upon the inner wall of the piston chamber, the same being governed by the piston. In order to provide means for connecting these discharge ports with the supply pipes or leads 18, 19, 20 and 21, which extend to the enginercylinders, each discharge port has a nipple Q2 connected to its pipe by means of the couplin-I 23.

Describing a complete cycle of operation of the `primer and assuming that the piston is in its fI Award position, when the piston is drawn 'rwardly the fuel will be sucked pressure is forced through the supply pipe 19 and so on in like manner and iii successive action as t-o the remaining ports c and al. Although a single .operation of the primer should be sutlieient under ordinary conditions yet the operation can be repeated as desired by the operator according to conditions. In the forward movement of the piston thev check valve 16 opens and freely permits the liquid fuel to pass through the piston to the circumferential groove and thence to be discharged as described. This lcheck-valve prevents any flow of liquid or fluid in tlie'opposite direction and the same is preferably employed in order to make a positive suction on the 'fuel supply and prevent anysuetion action from the engine and through the leads 18-21 as the piston is being drawn outwardly. By running the port and passage 11i through the body ofthe piston and connecting it with a circumferential groovey it becomes unnecessary to prevent rotation or any turning movement of the piston in the cylinder as will be necessary in case the passage was merely va groove or the like along the outer surface of the piston.

I claim:

1. A primer comprising a cylinder having a disclharge port through one side, and a piston reciprocatable in the cylinder and having intermediate its length an external groove adapted to register with the discharge poi-t and also having a passage coininuiiicating between the groove and one end of the cylinder, the cylinder having at said end a check-valved fuel supply port for admitting fuel to the cylinderon the suction stroke of the piston, the piston on its discharge sti-oke forcing the fuel `from the cylinder through said passage, groove and discharge port.

2. A primer comprising a cylinder having a series of discharge ports through one side and also having a fuel supply'port for admitting fuel to the cylinder on the suction stroke of the piston, and a piston reciproeatable in the cylinder and having intermediate its length an external groove, and a passage communicating.betweenthe front end of the piston and the groove, the piston on its discharge stroke forcing the fuel from the cylinder through said-pas' 65 sages, groove and discharge ports., such groove being arranged to registei'lwith the discharge orts successively.l

3.- A primer comprising a cylinder having a series of discharge ports through one side and also having a fuel supply port and a piston recipi'ocatable in the cylinder and having intermediate its length an external groove, and a passage extending through the body of the piston from the front end thereof to the groove, such groove being circumferential and arranged to register with the discharge ports successively.

4. A primer comprising a cylinder having a series of discharge ports through one side and also having a fuel supply port and a piston reciprocatable in the cylinder and.

-liaving intermediate its length an external groove, and a. passage communicating between the frontend of the piston and the groove, such groove being arranged to register with the dischargeports successively and said passage being eheck-valved for flow only toward the groove.

5. A primer comprising a cylinder having a series of vdischarge ports through one side 'and also having a fuel supply port and piston reciprocatable in the cylinder y and having intermediate its length an external groove, and a passage communicating between the front end of the pist-on and the groove, such groove being arranged to register with the dischargel ports successively, and said fuel supply port and said passage being eheck-valved for flow only to the cylinder and the groove.

6. A primer comprising a cylinder having a series of discharge ports through one side and 'intermediate the length thereof and also having a fuel supply port entering its front end, and a piston reciproeatable iii the cylinder and. having intermediate its length an external groove, and a passage communicating between the front end of the piston and the groove, lsuch groove being arranged to register with the discharge ports successively.

7. A primer comprising a cylinder having a series of discharge portsthrough one side and intermediate the 'length thereof, and also havinga fuel supply port entering its front end, and a piston reciproeatable in the cylinder and having intermediate its lengtha circumferential groove and a passage 'coinmunicating between the front end of the piston and the groove, such groove being arranged to register with the discharge ports successively.

8. A primer comprising a cylinderV having a. series of discharge ports through one side and intermediate the length vthereof and also having a fuel supply port entering its front end, and a piston reaiproeatahle in the Cylinder and having intrmediateits end of the passage :m orming :1 puri. thorn length an external groove, a passage com of, and i chock vulve in tho 5+ 11mg7 municating between tho front end of the JAMES B. W 517i piston and the groove, such groove being Witnossesz 5 arranged to register with the discharge DAVU) K, Emmi,

ports successively, a bushing in the front ROBERT Dommmmm. 

